duplicate of [/questions/1191750] thread. when start Firefox, multiple error-messages with "Your Firefox profile cannot be loaded. It may be missing or inaccessible" are popping up 3 or 4 times then start.And also pop up that error message when i try to open a new tab. i did :- deleted profile - deleted the profiles.ini file (same problem with new Firefox profile) - created a new profile with firefox.exe -P - deleted the mozilla folders in local, locallow and roaming - uninstalled and reinstalled Firefox but none of those seems not working. am using Windows 8.1 pro